Music-transposition chart.



PATENTED JUNE 28, 1904-,

W. H. PINLEY. MUSIC TRANSPOSI'I'ION CHART.

APPLICATION FILED SEPT. 19, 1903.

No MODEL.

' W/ TNESSES:

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UNITED STATES Patented J' une 28, 1904.

PATENT OFFICE..

WILLIAM HENRY FINLEY, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE- HALF TO F.J. HAMIL MUSIC COMPANY, OF CHICAGO, ILLINOIS.

MUSIC-TRANSPOSITION CHART.

SPECIFICATION forming' part of Letters Patent No. 763,870, dated June28, 1904.

' Application filed September 19,1903. vSerial No. 173,823. (No model.)

a chart through the medium of which any onecan transpose a piece ofmusic at sight without chance of mistake andwhich will .be of materialaid to persons writing music.

A further purpose of theinvention is to construct a device for thepurpose mentioned which will be not only simple in its character, butwhich will also prove an accurate Vguide readily understandable by anyperson having.

a slight knowledge of the principles of Inusical composition.

The invention consists in the novel construction and combination of theseveral parts, as will be hereinafter fully set forth, and pointed outin the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis speciication, in which similar characters of reference indicatecorresponding parts in both figures.

Figure l is a plan view of the device, and Fig. 2 is a section takenpractically on the line 2 2 of Fig. I.

The device consists of a base member A and an auxiliary member B, whichis adapted to rotate on the base member. Both of the members A and B maybe made of any desired material and may be given any desired shape. Asshow-n, the base; member A is of rectangular contour; but the revolublemember B is of circular form. The base'member A, however, is providedwith a circular field, corresponding in dimensions to the dimensions ofthe auxiliary or revoluble member B, and its circular eld is dividedinto a number of radial panels 10. VThese panels are subdivided bycircular lines 11, the centers of which are struck from the center oilthe said circular iield, the circular lines increasing in diameter asthey are removed from the center of the iield. Therefore thesubdivisions 12, formed in each panel of the aforesaid circular lines11, correspond, and at the head of each panel 10 amusicsign designatinga key is produced, reading,for example, C, G, D, A, C-Ilat, G-iat,D-iat, A- iat, E-fiat, &c. In the upper subdivision 11 of each panel thesign is duplicated, and in the other subdivisions of each panel thechromatic scale ofthe particular keyis produced, the natural scale beingin one style of letter and the accidentals in another style of letter,as is illustrated in Fig. l-as, for example, the style of letters 13,designating the accidentals ot' a given key, are in skeleton, while theletters 14, designating the natural scale, are produced in solid form.In the formation of the aforesaid circular iield on the base member Athe panels are separated by blank panels of corresponding formation.

In the construction of the rotary member or section B of the deviceradial panels l5 are formed, corresponding in size and in shape to theblank and lettered panels on the circular field of the base member A,andthe said panels 15 of the rotary member or section B are separated byopen panels 19 of the same size and dimensions as the panels 15 and thepanels on the circular iield of the base member.

The panels 15 on the rotary member or scction B are provided withsubdivisions 17, corresponding to the subdivisions l() on the panels ofthe base, the subdivisions on thc circular member B being produced bycircular lines 18, corresponding to the circular lines 11, subdividingthe base-panels. At the head of each panel 15 a letter or sign isproduced designating a given key, and below the sign the chromatic scaleof that particular key is produced. The style oi' letters 16,designating the natural scale, are made solid, and the style of letters16, designating the accidentals, are in skeleton form.

When, for example, a piece of music is Written in the key of C and it isto be transposed to the key ot' G, the panel on the rotary section ormember B bearing the scale of C is brought next to the panel on the baseA on which the scale of G appears, and wherever a note D is found on themusic the transcriber will know that that note must be changed to A inarranging the music for the scale of G,

as the A on the scale ofl G is opposite D on the scale of C. If, forexample, an accidental C-sharp is found in the music, by reference tothe chart the transcriber will know that it should be written (Jr-sharpto bring abouta proper arrangement in the scale of G, as G- sharp in theG scale will be opposite C-sharp in the C scale. Even if a person isproficient in music he cannot at times recall the eXact equivalent of anaccidental in one key When transposed into another key. By consultingthis chart the equivalent can be found immediately, and therefore atransposition may be made conveniently and in comparatively short time.

' It will be understood that in any given scale the letters of thenatural scale may be produced solidly or in skeleton form in one colorand the letters of the accidentals in solid or in skeleton form inanother color.

The rotary member B is pivotally mounted on the base member A in anysuitable or approved manner-as, for example, by passing a rivet ordouble-headed pin 2O through the center of the rotary member or sectionB and the center of the circular field on the base member or section A.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. A music-transposition chart, comprising a basemember having a circular field and spaced radial panels, each of whichhas the chromatic scale of' a given key produced thereon, and a rotarymember mounted to turn on the base over the circular fieldA thereof andprovided with radial panels separated by open panels, the solid radialpanels being each provided with the chromatic scale of agiven key, thepanels on one member corresponding to and adapted to register with thepanels on the other member, as set forth.

2. In a music-'transposition chart, a base member having a circularfield provided with radialvlines of letters representing the chromaticscales of different keys, and a member mounted to rotate on the basemember over the circular field and provided also with radial lines ofletters representing the different keys, the radial lines of lettersbeing separated by radial openings, for the purpose described. v

3. In a music-transposition chart, a base member having a circular fielddivided into radial columns of the same dimensions, the columns beingcorrespondingly subdivided, each subdivision of each column containing aletter of' a given chromatic scale, and a member mounted to revolve overthe field of' the base member, provided with a corresponding arrangementof' columns correspondingly subdivided and having corresponding lettersdesignating chromatic scales produced thereon, the said rotary memberbeing further provided With openings between the columns carrying thechromatic scales, the openings in the rotary member being of the samedimensions as the columns in the circular field of' the base member, asare likewise the columns carrying the scales on the rotary member ofcorresponding size and arrangement to the columns on the circular fieldofthe base member, as set forth.

4. In a music-transposition chart, a base member having a circularfield, and chromatic scales of different keys radially produced thereon,an auxiliary member mounted to revolve over the circular field, providedwith alternate panels and openings corresponding in size to the panelson the base, the panels having the letters of the chromatic scales ofthe different keys produced thereon, the letters of each scale on bothmembers being of a form or style to distinguish the letters of' thenatural scale on both members from the accidental letters in the samescale, as described.

5. In a music-transposition chart, a base member having displayedthereon the chromatic scales of the various keys in separate columns, asecond member mounted to rotate on the base member, having openingsWhich register with the said columns on the said base member, the spacesbetween the openings having each produced thereon the chromatic scale ofa given key, the arrangement of' the scales on both members being incorresponding order, as specified.

In testimony whereofI have signed my name to this specification in thepresence of two subscribing witnesses.

l/VILLIAM HENRY FINLEY.

Witnesses:

ERNEs'rINE OTTO, DANIEL T. QUINN.

